40c question
40c question
just put a new alternator, would like to check if it charging. if i do it like old car by removing the positive on the battery, should my engine keep turning? cause right now, when i remove the positive, my engine shut down. thanks
- Stan Disbrow
- 350 crawler
- Posts: 2904
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Hi,
I presume you have a 12v conversion. There are 6v alternators out there, but they are not common.
Alternators don't keep working when the battery is disconnected. They need battery power to form the field as they don't have magnetized iron plates they way generators do.
To check charging, use a voltmeter on the battery to look for a voltage of around 14 volts when the machine is running.
Stan
I presume you have a 12v conversion. There are 6v alternators out there, but they are not common.
Alternators don't keep working when the battery is disconnected. They need battery power to form the field as they don't have magnetized iron plates they way generators do.
To check charging, use a voltmeter on the battery to look for a voltage of around 14 volts when the machine is running.
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
I've noticed that there is a slight amount of magnetism in the area of the back bearing on a working alternator - barely noticeable, but enough to swing a screwdriver if held lightly. As Stan says - a meter is the best proof, but I'm apt to have a screwdriver in my pocket, not so apt to have a meter.
420C, 5 roller, 62 blade
- Stan Disbrow
- 350 crawler
- Posts: 2904
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Hi,
If it was the wire from the alt to the batt, and the old alt was lower output, then I can see it getting warm with 85 amps available.
Any other wire gets hot, just upping the gauge is asking for smoke to be let out of something else......
The best troubleshooting item for any electrical work is a DVM. And, I always suggest Fluke meters. Get a good one, not a cheap one.
Stan
If it was the wire from the alt to the batt, and the old alt was lower output, then I can see it getting warm with 85 amps available.
Any other wire gets hot, just upping the gauge is asking for smoke to be let out of something else......
The best troubleshooting item for any electrical work is a DVM. And, I always suggest Fluke meters. Get a good one, not a cheap one.
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Stan If the alternator stops working with out a battery,How would a car run without a battery. On more than one occasion I have used a battery to start a car than removed the battery . One time i drove 3 miles to an autoparts store with out a battery. that vehicle was a 95 VW definitely an alternator.
thanks
thanks
68 350 loader
79 350c loader
88 case 580k 4x4
89 ford 2120 4x4
79 350c loader
88 case 580k 4x4
89 ford 2120 4x4
I know one thing that can happen with NO battery they CAN run BUT there is NO voltage control ( volts can go sky high) so you can fry anything (ON) that is voltage sensitive
2010 with 622 dozer with mod. 35 ripper and a 2010 with 622 dozer bought in 1969 and a 2010 loader with drott and mod. 36 ripper
- Stan Disbrow
- 350 crawler
- Posts: 2904
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Hi,
I have always had cars and trucks sputter and then die if the batt became disconnected while running. The regulator can't work right, so the voltage swings ever lower and higher until the low goes to zero and the thing quits.
The only thing that might help is if you had a big capacitor somewhere, like for an audio power amp.
And, as noted, the high side excursions love to fry all sorts of other things which are turned on at the time.
My neighbor's son just had his the battery in his modern VW go bad while running, and it fried his PCM and rather costly audio system. So, I guess the big cap in power amp didn't help.....
Stan
I have always had cars and trucks sputter and then die if the batt became disconnected while running. The regulator can't work right, so the voltage swings ever lower and higher until the low goes to zero and the thing quits.
The only thing that might help is if you had a big capacitor somewhere, like for an audio power amp.
And, as noted, the high side excursions love to fry all sorts of other things which are turned on at the time.
My neighbor's son just had his the battery in his modern VW go bad while running, and it fried his PCM and rather costly audio system. So, I guess the big cap in power amp didn't help.....
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Who is online
Users browsing this forum: No registered users and 26 guests